function D(id) {
    return document.getElementById(id);
}

function showGroup(memberId, e) {
    console.log()
    var arrow_right = e.firstElementChild;
    var arrow_bottom = arrow_right.nextElementSibling;
    if (e.classList.contains('on-active')) {
        arrow_bottom.style.display = "none";
        arrow_right.style.display = "inline";
        D(memberId).style.display = "none";
        //切换样式
        e.classList.toggle('on-active');
    } else {
        arrow_bottom.style.display = "inline";
        arrow_right.style.display = "none";
        D(memberId).style.display = "block";
        //切换样式
        e.classList.toggle('on-active');
    }
}